V2V Network
In 2014, 32,675 people died due to car accidents in the United State, which means 89 people died each day on the road. Ninety percent of those car accidents are due to human reckless driving habits, such as driving over the speed limit, driving under the influence of alcohol, running the red light, and multitasking while driving. Although police enforcements, such as speeding detection camera, red light camera, and inductive loop sensor, are increasing its effectiveness, car accidents are still unstoppable due to limited human crisis assess and natural barriers.
A possible solution to this crucial issue is the vehicle to vehicle (V2V) communication system also known as the car to car communication. V2V system is a network which vehicles and public traffic facilities can communicate over dedicated short range communication (DSRC), a wireless protocol similar to Wi-Fi. Each vehicle will exchange information about the position, speed, direction, brake status, and other data with vehicles within a few hundred meters, which enable the vehicles to stimulate and anticipate possible routine for each vehicle to safely proceed on or warned the driver for a potential collision. Another scenario, drivers always have difficulty in judging the best response to a yellow traffic light, whether stopping or crossing, an immature or delayed decision can lead to a side collision and also a rear-end collision caused by the drive pressed the brake to the floor suddenly. In this case, the V2V system can allow the vehicle to communicate with the traffic light system and clearly calculate the best response and prompt the driver before it too late.
Even though this networks of the vehicles will significantly reduce the amount of vehicle collision, there are still limitations of this network. First, the precondition of this system of the network to function completely is that all vehicles and public traffic facilities have this DSRC feature installed, which is a timely and costly process. For example, some vehicle is equipped with the feature and at an intersection, a vehicle without the DSRC feature run the red light but the V2V network can’t communicate with that vehicle, a collision still remains highly possible. This is similar to a relation network which some of the connection are one directional or not connected, so those on the other end of the nodes are missing out the information. For the V2V system to function at it most effectively level the system need to be a complete network, which is also the same for a relation networks. A complete network promotes a full symmetry information.
Isolated Node
https://www.technologyreview.com/s/534981/car-to-car-communication/
http://www.consumerreports.org/cro/magazine/2012/04/vehicle-to-vehicle-communication-can-prevent-crashes/index.htm
https://en.wikipedia.org/wiki/Vehicular_communication_systems
https://en.wikipedia.org/wiki/List_of_motor_vehicle_deaths_in_U.S._by_year
http://www.alertdriving.com/home/fleet-alert-magazine/international/human-error-accounts-90-road-accidents